Free Printable 平方根②

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Worksheets

平方根②

Total questions: 24

Worksheet time: 18mins

Name

Class

Date

1.

$\sqrt{5}\sqrt{7}$ を $\sqrt{a}$ の形に表すと?

a)

$\sqrt{57}$

b)

$\sqrt{75}$

c)

$\sqrt{12}$

d)

$\sqrt{35}$

2.

$\frac{\sqrt{12}}{\sqrt{6}}$ を $\sqrt{a}$ の形に表すと?

a)

$\sqrt{3}$

b)

$\sqrt{4}$

c)

$\sqrt{72}$

d)

$\sqrt{2}$

3.

$\sqrt{3}\sqrt{\frac{10}{3}}$ を $\sqrt{a}$ の形に表すと?

a)

$\sqrt{3}$

b)

$\sqrt{15}$

c)

$\sqrt{2}$

d)

$\sqrt{10}$

4.

$\sqrt{0.25}\sqrt{12}$ を $\sqrt{a}$ の形に表すと?

a)

$\sqrt{8}$

b)

$\sqrt{15}$

c)

$\sqrt{48}$

d)

$\sqrt{3}$

5.

$\sqrt{30}\div\sqrt{6}\times\sqrt{3}$ を $\sqrt{a}$ の形に表すと?

a)

$\sqrt{60}$

b)

$\sqrt{\frac{5}{3}}$

c)

$\sqrt{5}$

d)

$\sqrt{15}$

6.

$\sqrt{42}\div\sqrt{7}$ を $\sqrt{a}$ の形に表すと?

a)

$\sqrt{8}$

b)

$\sqrt{\frac{42}{7}}$

c)

$\sqrt{3}$

d)

$\sqrt{6}$

7.

$3\sqrt{2}$ を $\sqrt{a}$ の形に表すと?

a)

$\sqrt{8}$

b)

$\sqrt{6}$

c)

$\sqrt{12}$

d)

$\sqrt{18}$

8.

$4\sqrt{5}$ を $\sqrt{a}$ の形に表すと?

a)

$\sqrt{10}$

b)

$\sqrt{20}$

c)

$\sqrt{40}$

d)

$\sqrt{80}$

9.

$\frac{3\sqrt{8}}{2}$ を $\sqrt{a}$ の形に表すと?

a)

$3\sqrt{2}$

b)

$\sqrt{36}$

c)

$\sqrt{9}$

d)

$\sqrt{18}$

10.

$\frac{2\sqrt{6}}{\sqrt{3}}$ を $\sqrt{a}$ の形に表すと?

a)

$2\sqrt{2}$

b)

$\sqrt{4}$

c)

$\sqrt{6}$

d)

$\sqrt{8}$

11.

$\frac{\sqrt{2}\sqrt{20}}{3\sqrt{5}}$ を $\sqrt{a}$ の形に表すと?

a)

$\sqrt{\frac{8}{3}}$

b)

$\sqrt{8}$

c)

$\sqrt{\frac{4}{9}}$

d)

$\sqrt{\frac{8}{9}}$

12.

$\sqrt{12}$ を $a\sqrt{b}$ の形に表すと?

a)

$3\sqrt{2}$

b)

$2\sqrt{3}$

c)

$6\sqrt{2}$

d)

$4\sqrt{3}$

13.

$\sqrt{24}$ を $a\sqrt{b}$ の形に表すと?

a)

$6\sqrt{2}$

b)

$2\sqrt{6}$

c)

$3\sqrt{8}$

d)

$4\sqrt{3}$

14.

$-\sqrt{72}$ を $a\sqrt{b}$ の形に表すと?

a)

$-6\sqrt{3}$

b)

$-6\sqrt{2}$

c)

$-2\sqrt{18}$

d)

$6\sqrt{-3}$

15.

$\sqrt{28}\sqrt{27}=?$

a)

$6\sqrt{21}$

b)

$6\sqrt{7}$

c)

$3\sqrt{42}$

d)

$12\sqrt{3}$

16.

$\sqrt{18}\sqrt{50}=?$

a)

$30$

b)

$30\sqrt{2}$

c)

$15\sqrt{4}$

d)

$6\sqrt{5}$

17.

$\sqrt{24}\div\sqrt{300}=?$

a)

$\frac{\sqrt{2}}{5}$

b)

$\frac{3\sqrt{2}}{10}$

c)

$\frac{3\sqrt{2}}{5}$

d)

$\frac{\sqrt{6}}{5}$

18.

$\frac{3}{\sqrt{5}}$ を有理化すると?

a)

$\frac{3\sqrt{5}}{5}$

b)

$\frac{\sqrt{3}}{5}$

c)

$\frac{\sqrt{15}}{5}$

d)

$\frac{\sqrt{5}}{3}$

19.

$\frac{4}{\sqrt{6}}$ を有理化すると?

a)

$\frac{2\sqrt{6}}{3}$

b)

$\frac{\sqrt{6}}{3}$

c)

$\frac{4\sqrt{6}}{3}$

d)

$\frac{\sqrt{6}}{6}$

20.

$\frac{5}{2\sqrt{3}}$ を有理化すると?

a)

$\frac{5\sqrt{3}}{6}$

b)

$\frac{5\sqrt{3}}{3}$

c)

$\frac{5\sqrt{3}}{12}$

d)

$\frac{10\sqrt{3}}{3}$

21.

$\frac{4}{3\sqrt{2}}$ を有理化すると?

a)

$\frac{2\sqrt{2}}{3}$

b)

$\frac{4\sqrt{2}}{6}$

c)

$\frac{\sqrt{2}}{6}$

d)

$\frac{\sqrt{2}}{3}$

22.

$\frac{7}{\sqrt{18}}$ を有理化すると?

a)

$\frac{7\sqrt{2}}{6}$

b)

$\frac{7\sqrt{3}}{6}$

c)

$\frac{7\sqrt{2}}{3}$

d)

$\frac{7\sqrt{3}}{2}$

23.

$\sqrt{3}=1.732$ を与えたときに求められるものを全て選べ

a)

$\sqrt{300}$

b)

$\sqrt{48}$

c)

$\sqrt{1470}$

d)

$\sqrt{0.3}$

e)

$\frac{3}{5\sqrt{3}}$

24.

$\sqrt{2}=1.414$ を与えたときに求められるものを全て選べ

a)

$\sqrt{720}$

b)

$\sqrt{0.08}$

c)

$\sqrt{162}$

d)

$\sqrt{0.2}$

e)

$\frac{\sqrt{3}}{\sqrt{6}}$

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